Metal-reinforced railway-tie.



Patented Dec. 7

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METAL REINFORGBD RAILWAYTE.

APPLIGATION FILED JAN. a, 190s.

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JOHN F. LAHART, OF MINNEAPOLIS. MINNESOTA.

METAL-REINFORCED RAILWAY-TIE.

Specification of Letters Patent.

Patented Der. 151051.

Application tiled January 3. 1908. Serial No. 409.160.

ll y i lo all 'trito/a 'it may concern:

. lie it known that l. Joux l". l..\li.\n'r, a citIzen o l" Athe tmted- States. residing vat -'.\liunea| olis.-in the county of Ilennepin and State ol .\linnesota. have invented certain neu and useful Improvements in Metal-lieinl'oreed llailvva'vlies: and I do hereby declaile the following to be a full. clear, and exact description of the invention` such as u illl enable others skilled'in the art to which il appertains to make and use thesame.

' My present invention has for its object to provide an improved metal reinforced railwa;y tie and is in the nature of an improve.- mcnt en the reinforced railway tie disclosed and claimed in my pending 'application S. N.

377,328, tiled June 5, 1907.

"lhc invention consists of `the novel devices and combinations o'f devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure l is a plan view, showing 011e of the improved ties and a portion of one of the rails applied thereto. Fig. 2 is a vertical longitudinal section taken on the line .r2 a of Fig. 1; and Fig. 3 is a transverse. vertical section taken on the line ar" af* of Fig. 2.

The main body portion 1 of the tie is of concrete. '.lhe'top of this tie body is flat the bottom thereof is rounded approximately asshown in Fig. 3, for an important purpose which will hereinafter more fully ap'- 'lhe -foot [langes of the rails 2 fit slightly depressed seats 3 of metal saddle plates 3, which saddle plates are countersunk into the upper surface of the tie body 1. For eachV saddle plate 3 vthere, is a rail anchoringdevice in tfheform of a large U- bolt or. staple 4,thc body of which is cast `into the concrete body, andthe threaded `eiulsot`avhich project'upward through per- 'l'oratious Athat are'ccntrally located inthe llanges 'of `the*copera-tingg; saddle plate 3,V

one our each side of the railehannel 3. The loot Ilanges ot' the' rail.4 are directlyengaged by metal clamps or clipsl through which the threaded ends ol the staples l are passed, and nnls'ttapplied to the said threaded ends rigidly hold the. saidv clamps against the said rail Ilauges. Lateral thrust strains,- such tend to slide. the rails laterally, are taken directly by thersaddlev plates, so that the staples or U-bolts l. cooperating clamps and nutst' have only to hold the rails against tilting movements and. ol course. against vertical movements in respect to the tie body.

lVith the rails rigidly and un \i'ieldingly clamped to the tie as above described or by other means. there is necessarily more or less vibration imparted to the entire tie: and I have found in practice that this vibration, when the tie body is made rectangular or with a iat bottom, will soon work the tie loose in the roadbed. I have further found in practice that by roundingl *he bottom alul lower side portions of the tie a sort of self-tamping tie will be provided. More particularly stated, a tie thus rounded will, of course, lit a correspondingly rounded seat in the roadbed, and when the tie slightly raised any dirt or other material loosened up below the tie will run downward in a direction toward the bottom of the tie seat, and each time that the tie is I depressed will be flattened and packed, so that it becomes part of the tie seat. ln this way, loosened material instead of being forced ont from under the tie is packed under the tie and the tie seat is kept approximately in normal condition.

To reinforce the concrete body of the tic and to securely lfasten the saddle plates 3 to the tie body, a multiplicity of metal rods are embedded within the tie. body. The preferred arrangement of these reinforcing rods is shown in the drawings and described as follows: A paid of upper reinforcing rods 7 and a pair of lower reinforcing rods 8 are extended approximately from end to end of the tie body, in parallel arangernent, grouped in the vicinity of the longitudinal axis of said tie body. Each of these rods 7 and 8 is turned around and anchored to one of the rail -anchoring staples 4, as shown at 7a and 8. Short truss rods 9 are ex- ;tended through perforations in and aresecured to the inner edge of each anchor plate 3; and, in a similar manner, two relatively long truss rods 10 are passed through perforations in and are secured to the outer edge of each saddle plate 3. The relatively short rods 9 are passed under the saddle plate to which they are attached and are extended nearly but not quite to the adjacent or near end of the tie body, while the relatively long truss rods 10 are passed uiulerpboth saddle v`plates-and extend nearly butjnot irritato the free end of the tie body. These enibedded metal rods give great. strength to the concrete tie body, and the rods t) and l0 also serve to very securely anchor the plates 3 to the said tie body.

In actual use a reinforced concrete tic substantially as above described has been found highly etiieient for the purposes had in View. y

IVhat. I elaitn is:

1. In a railway tic, the combination with a concrete. body, of metal saddle plates on the upper surface of said concrete body, and metal truss rods connected to the opposite edge portions of said saddle plates and embedded in Said concrete body7 substantially as described.

2. In a railway tie, the combination with a concrete body, of channeled metal .saddle plates seated in the upper surface o1 said concrete body, rail anchoring staples elnbedded in said concrete body and havin;` nutted end portions projecting` through said Saddle plates7 and revereely extended relatively long and short truss rods secured to i l l l l l the edge portionsl ot. lsaid saddle plates and embedded in and extended longitudinally of said concrete body, substantially as described.

3; In a railway tie, the eoinbimition with ya concrete body, of channeled saddle plates "ated in the upper eurtaee of said tie body. rail anchoring staples embedded in `said tie body and having nutted ends ]nojeetin t lthrough and above, said saddle plates` reversely extended relatively lonzgr and short truss rods secured to the opposite edges ot .said saddle plates and embedded in and extended longitudinally ot said tie body. and additional reinforcingrods embetlded in and extended longitudinally ot said tie body and directly secured to said stal'des. .subshuitiatly as described.

In testimony whereot' I atlix my .signature in presence ot t'\\'o witnesaes.

.IOIIN lt. IiAllAlt'l.

litnesses i Il. I). Kninolu-,

Matan llonti. 

